Okavango Delta or Okavango Swamp, in Botswana, is the world's largest inland delta. It is formed where the Okavango River empties onto a swamp in an endorheic basin in the Kalahari Desert, where most of the water is lost to evaporation and transpiration instead of draining into the sea. The Moremi Game Reserve, a National Park, spreads across the eastern side of the...